Superheater.



C. D. YOUNG.

SUFEHHEATER.

APNIC/111011 man ,1l/111.111.1914.

1,288,364, v f Patent-911 Dec. 17, 1918.

ED STATES Maur onion.

SUPERHEATER.

Specification of Letters Patent.

Patented Dec. 17, 1918.

Application filed March 19, 1914. Serial No. 825,731.

To all whom t may concern Be it known that I, CHARLES D. YOUNG, acitizen of the United States, residing at Altoona, in the county ofBlair and State of Pennsylvania, have invented certain new and usefulImprovements in Superheaters, of which the following is a specification.

The invention relates to superheaters particularly designed for use inlocomotives, traction engines, and the like. l: has for its primaryobject; the provision of an improved header construction wherein the drypipe may lbe removed without interference by the usual partition wall;and wherein the said partition wall acts as a stay for the front wall ofthe header; and the provision of improved and simplified pipingconnections from the header to the engine cylinders. One embodiment ofthe invention is shown in the accompanying drawing, wherein- Figure 1 isa longitudinal section through the smoke box of a locomotive containingmy improved superheater, such section being taken on the line 1 1 ofFig. 2, Fig. 2 is a transverse half section through the smoke box at theforward end oi" the superheater, and shows such superheater in frontelevation with a portion of the front wall broken away, and Fig. 3 is adetail section on the line III-HI of Fig. 2.

Referring to the drawings; 1 is the smoke box of a locomotive; 2 is theboiler carrying the usual dry pipe 3 leading from the steam dome; 4:, 5,6, and 'l' are the tire tubes in which lie the superheater tubes 8, 9,10, and 11; 12 and 13 are the upper and lower superheater chambersrespectively, and 14 is the stack of the locomotive.

The walls of the chambers 12 and 13 con sist of the top plate 15 (Fig.2) forming a part of the smoke box wall, the back plate 16 which is aport-ion of the line sheet, the front plate 17, the bottom plate 18, andthe partitionV plate or wall 19 which separates the upper chamber 12from the lower chamber 13. The plate 19 acts as a stay for the frontplate 17, and such front plate is provided with an opening closed by thecover plate 20. This permits the removal and replacement of the dry pipe3. The arrangeA ment involving the use of the horizontal partition plate19 over the use of a vertical plate resides not only in the function ofsuch plate as a stay for the front wall, but in the fact that the plateis gotten out of the way of the dry pipe, it being necessary with avertical partition plate to provide an opening therethrough for thepassage of the dry pipe and a cover plate for such opening.

One end 20 of each of the superheater pipes is expanded into the lowerplate 18 and communicates with the lower chamber 13, whileV the otherend 21 extends through the lower plate 18 and the lower chamber, and has its extremity expanded into the partit1on plate 19 so that such endcommunicates with the upper chamber 12. In order to make the end 21tight where it passes the plate 18 the tube is expanded just above andVbelow such plates as indicated most clearly in Fig. 2. In order to giveaccess yto the tube ends 2O for expanding or cutting out, openingsthrough the partition 19 are provided, which Openings are closed byremovable screw plugs 22 (Fig. 2). Access is given to the plate 19 andthe tube ends therein .and therebeneath, by means of the hand holes inthe top plate 15 closed by the removable cover plates 23 placed atsuitable intervals.

The smoke box walls are cut away at the ends of the chamber 13 asindicated at 24 (Fig. 2), and the bottom and partition plates 18 and 19are flanged and riveted to the smoke box wall as indicated at 25 and 26(Fig. 2). Riveted to the wall of the smoke box on each side is a shell26 of sheet metal preferably covered with asbestos' and communicating atits upper end with the chamber 13. rlhe wall of the smoke box is thusmade to constitute a side of the passage way for conducting steam fromthe chamber 13 to the valve chest and thence to the cylinder of theengine. A casting 27 at the lower end of the shell 26 is coupled to thecasting 2S on the valve chest by means of the member' 29, a packingring` 80 and ground joint 31 being employed, although any desiredconnect-ion might be employed. rlhis arrangement involving the shell 26is advantageous, as the placing` of the passageway on the outside leavesmore room in the smoke box and avoids interferences with iiues andsuperheater tubes. The construction is simple and inexpensive andaffords a most direct connection between the superheater chamber and thesteam cylinders, and one without a multiplicity of objectionable bends.The passageway is further not cooled to the same extent as the ordinaryoutside pipe, since one side is ormed by the smoke box wall which isrelatively hot. @ther advantages will be apparent to those skilled inthe art.

In operation saturated steam from the dome flows through the dry pipe 3and into the chamber 12, thence into the ends of the superheater tubesexpanded into the partition sheet 19. After passing through the lengthsof tubes 8, 9, 10, and 11 lying in the lire tubes, the supcrheated steamHows into the chamber 13, passing transversely through this chamber tothe shells Q6 and thence to the steam cylinders of the engine.

What claim is:

1. In combination with a boiler having fire tubes and a dry pipe leadinOthrough the flue sheet thereabove, a header having a rear wallconstituting a part of the said iue sheet through which the dry pipeleads and having a front wall with an opening opposite the end of thedry pipe, a removable cover plate for such opening, a sub stantiallyhorizontal partition wall lying below the dry pipe and dividing theheader into an upper and a lower chamber, and superheater tubes lying inthe iire tubes and each having one end leading into the lower chamberand the other end extended through such lower chamber and the partitionwall and communicating with the said upper chamber.

2. In combination with a boiler having iire tubes and a dry pipe leadingthrough the fine sheet thereabove, a header having a rear wallconstituting a part oithe said flue sheet through which the dry pipeleads and having a front wall with an opening` opposite the end of thedry pipe, a removable cover plate for such opening, a substantiallyhorizontal partition wall lying below the dry pipe and dividing theheader into an upper and a lower chamber, with the neseee said lowerchamber opening through the smoke-box walls, superheater tubes lying 1nthe fire tubes and each having one end lead-` ing into the lower chamberand the other end extended through such lower chamber and the partitionwall and communicating with the said upper chamber, and outlet pipeslying' outside the smoke-box and leading from the ends of the lowerchamber.

3. in combination with a locomotive vhaving hre tubes, and a smoke boxat its front end with 'the opposite sides of such smoke box providedwith openings, of a super heater in the smoke box comprising twochambers, lone of which is open at its ends in alinement vwith theLopenings through the walls of the smoke box, and a `passage leadingfrom each of said ends to a locomotive cylinder and having as a part ofits wall the wall of the smoke box.

4. 1n combina-tion with a locomotive having iire tubes and a smoke boxat its front end with the opposite sides of such smoke box provided withopenings, of a superheater in the smoke box Comprising two chambers, oneof which is open at its ends in alinement with the openings through thewalls oi' the smoke box, and passages lying on the outside of the smokebox and leading :troni the said ends of the chamber to the cylinders ofthe engine, the said lpassages being shells open on their inner sidesand secured against the smoke box walls, so that such walls constitutethe inner sides of the said passages.

in testimony whereoil I have hereunto signed my name in the presence ofthe two subscribed witnesses.

CHARLES D. YOUNG.

Witnesses S. E. Greer-mnu?, J. T. HANLON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

